Bag



Dec. 16, 1930. r M. R. KENDALL 1,785,125

- BAG Filed A ril 28, 1928 s Sheets-Sheet; 1

gwue'ntor $14 W%\& I

aktozmq Dec. 1 1930. M. R. KENDALL 1,785,126

BAG

7 Filed April 28 1928 3 Sheets-Sheet 2 Ill gwuwntoz M. Zen oaZZ Dec. 16, 1930.

M. R. KENDALL BAG 3 Sheets-Sheet 3 Filed April 28, 1928 v 3 m W WM 8151,QWgQ Patented Dec. 1 6, 1936 UNITED STATES PATENT OFFICE MARVIN R.KENDALL, OF CHICAGO, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENT S, TO ST.REGIS PAPER COMPANY, OF NEW YORK, N. Y. A CORPORATION OF NEW YORK BAG-Application filed Apri1'28,

This invention relates to a gusseted bag and more particularly to agusseted bag having its end closed by a seam and folded or creased so asto open out in the desired manner. Details of the invention will appearas the description proceeds.

and right sides of Fig. 4; Fig. 7 is a view oftheright side of the endof a bag as shown in Fig. 4, but after the creasing" operation iscompleted; Figs. 8 and 9 are views, respectively, of the left and rightsides of the endof the bag after the creasing operation is completed;Fig. 10 is a plan view of the end of the bag creased as shown in Figs.7, 8 and 9; Fig. 11 is a view similar to Fig. 9, but taken after the endof the bag is turned to bring it parallel with the body of the bag; Fig.12 is a view of the valve end of the bag illustrating how the ba may bepicked up toput it on a filling evice; Fig. 13 is a perspective view ofthe right end of the bag when it is picked up for placing it upon thefilling apparatus; Fig 14 is a side view of a bag in filling position;Fig. 15 is a view of the bottom of the bag partially opened; Fig. 16

' is a View of the bottom of the filled bag;

Fig. 17 is a view of the developed blank, indicating the lines on whichit is folded; and Fig. 18 is a section of the end of the bag on thecentral vertical plane of Figs. 5 and 6.

It is old to form a gusset folded bag formed with a tubular body portion20 and having a gusset 21 extending completely along one side and havinga gusset 22 extending from one end to nearly the other end of the otherside, there being a valve 23 folded in at one end of gusset 22. The endof the bag is shown as being closed by a reinforcing seam 24. Some.difiiculty has been encountered in placing such a bag upon the tube ofa filling machine adapted to fill 1928. Serial No. 273,490.

valve bags. In order to avoid this difiiculty, I open up and crease theend of the bag in the manner described below. When the gussets 21 and 22are opened up adjacent the gusset 21 is caught in seam 24 and down-,

ward to point 29 where the held together.

When the movement is continued until the gussets are completely spread,the valve is once more collapsed, as shown in Fig. 8, and the gusset iscompletely straightened along 27 and the sides of the walls are broughtagainst the walls folded alon line 27, as shown in Fig. 9. After thebaghas been thus creased along lines and 26, the bag may be straightenedout once more to the position in which it is shown in Fig. 1,-forpurposes of transportation, but preferably the end of the bag is tippedover, as shown in Fig. 11, so that it lies substantially parallel withthe body of the bag.

When the bag has been creased and folded in the manner described, it maybe picked up by the seam, as indicated in Fig. 12, whereupon the bagautomatically returns to the position in which it is shown in Figs. 4, 5and 6 and in perspective in Fig. 13. When in this position, the valve isopened'up, as shown in Fig. 5, and may be readily slipped over the endof a filling tube 30, as shown in Fig. 14.

The bottom of the bag may be made in the same wayasthe top of the bag,except that there is no valve. If this is done the bottom of the bag isclosed by aseam 31 and the bag is creased along lines 32 and 33, thegusset being straightened along line 34, lines 32, 33 and 34corresponding as to lines 25, 26 and 27 respectively, of Fig. 6, exceptthat they are formed at the bottom of the bag. It will be readilyunderstood that the bottom of the gusset may be bag is the same at bothsides thereof. When the bottom of the bag is creased in this manner, itautomatically opens up in the manner indicated in Fig. as soon as the babegins to open, the paper along lines 34 acting substantially as a braceto keep lines 32 and 33 spread apart. Seam 31 may fall away fromline34:, slightly, at the start, but when'the material enters the bag itpromptly spreads apart lines 32 and .33, spreading the bag along line34, as shown in Fig. 16.

It willbe readily seen from the above that my method of creasing the endof the bag is advantageous at the valved end of the bag because itenables the operator to place the bag on the filling tube with one hand,since the outstanding seam is readily seized and the valve opening opensup automatically when I the bag is lifted by the seam. Furthermore, itprovides for the proper opening and filling ol" the bottom of the bag.

In the construction shown the creases along lines 25, 26, 32 and 33 areat a distance from the respective end-closing seam substantially equalto the depth of the gusset fold, and this is the preferred arrangement,but the end might be spread more or less than the width of the gusset ifdesired. In the construction shown the creases and 26 reach the valveopening at the middle of the sides of the valve, and that is the mostadvantageous position for readily opening the valve, but a similaradvantage is obtained by a crease anywhere in the middle portion of thesides of the valve.

Other changes may be made in the construction of the bag and in themanner of creasing, within the terms of the appended claims.

What I claim is:

1. A bag comprising a tubular body portion having gusset folded sidesand an outstanding end closing seam, the walls of the bag being creasedacross the end substantially parallel with the seam and at a distancefrom the seam substantially equal to the depth of the gusset fold.

2. A bag comprising a tubular body portion having gusset folded sidesand an outstanding end closing seam, the gusset folds being collapsedexcept adjacent the seam where the gusset is straightened, thisstraightened portion of the gusset being bent ibnto alinement with thebody portion of the 3. A collapsed bag having an end closed by anoutstanding seam, one corner being tucked in adjacent the seam to form avalve and the valve being spread laterally of the bag and then bent intoalineinent with the body of the bag.

4. A valve bag comprising a body portion closed by an outstanding seamand having its wall tucked in adjacent one end of the seam to form avalve, the wall being creased

